I have windows 7 with 4GB of RAM. When the system starts from a fresh boot I start with about 33% usage. However, if I walk away with my PC idle for a few hours, or over night, my PC typically climbs to the high 80s or even over 90% usage (once, it got as high as 98%!).
The biggest commit is usually SVCHost.exe at around 500MB. My sidebar.exe process also tends to climb to about the same number.
This is a new development since upgrading to Win7 SP1, and I'm not finding much info about it on the internet. Has anyone else encountered this problem?
Edit It is causing severe performance issues when I come back to the PC. I have to reboot to get the memory back.
Edit 2: Tagged as "service-pack". This issue did not occur until SP1 was installed, so I'm wondering if that may be the root cause.